Air circulating attachment



July 28, 1942. J. J. JUBY. JR

AIR CIRCULATING ATTACHMENT Filed Aug. 14, 1940 (Ta/27a JJZlb 177';INVENTOR.

ATTORNEYS Patented July 28, 1942 UNlTED STATES PATENT OFFICE AIRCIRCULATING ATTACHMENT John J. Juby, Jr., Marblehead, Ohio ApplicationAugust 14, 1940, Serial No. 352,610

2 Claims.

The present invention relates to an air circulating attachment forstoves and furnaces and more especially to furnaces of the hot air type.

An important object of the invention resides in the provision of anattachment including a blower that will draw in relatively cold air fromthe exterior of the stove or furnace and feed the same through a tubeheated by the stove or furnace Where it mixes with and is expelled withthe hot air produced by the stove or furnace.

Another object of the invention is to provide a heating coil positionedin or around the combustion chamber of a heating device and means forfeeding relatively cold air thereto to be heated therein to be expelledwith the heated air of the combustion chamber.

The invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawing andspecifically pointed out in the appended claims.

The figure is a vertical sectional view of a stove equipped with the aircirculating attachment, parts thereof being shown in elevation.

Referring to the drawing for a more detailed description thereof, in thefigure there is disclosed a heating stove of conventional constructionthat is generally designated by the reference numeral 5 which includesan outer casing 6, a combustion chamber I, and fire-box 8. The casingrests upon a base 9 and the upper end of said casing is provided with amultiplicity of openings I through which heated air is expelled. Anoutlet pipe II projects from the combustion chamber 1 for carrying offwaste gases, said pipe being suitably connected with the combustionchamber in a manner well known in the art.

An angularly disposed air duct I2 is formed in the combustion chamberadjacent the upper end thereof and communicates with the central outletI3 through which heated air is expelled for discharge through theopenings III.

The air circulating attachment includes a blower I4 mounted in thecasing 6 near the bottom end thereof for drawing in cold air from theexterior of the furnace. The blower is attached to the casing by meansof a plate I and the outlet end It of the blower is attached to aflexible tubing IT. The tubing I1 is coiled around the lower section ofthe combustion chamber as indicated at I8 and extends upwardly aroundthe casing with its opposite end I9 entering the air duct I2 andterminating in a flange coupling 20 within the outlet I3. The heat ofthe combustion 6 is also heated and a certain amount of cold air.

will be drawn in through the inlet opening 2I to be heated anddischarged through the openings II]. A certain amount of the airentering the opening ill will be directed into the duct I2 since saidduct is open at opposed sides of the combustion chamber.

Thelblower I4 is controlled from a thermostat generally designated bythe reference numeral 22, said thermostat being of the type including aswitch adapted to be actuated for operating the blower as thetemperature drops and rises.

Thus it will be seen that in the invention shown in the figure, cold airwhich is present on the floor and around the casing I5 will be fedthrough the tubing I8 where it is heated by the combustion chamber anddischarged into the room. A vacuum will be created adjacent the upperend of the combustion chamber for drawing the air through the opening 2|to be heated in the space between the combustion chamber and the wall ofthe casing, the flow of the heated air being indicated by the arrows.

Also it will be understood, of course, by those skilled in the art thatvariations in the hereinabove described device involving thesubstitution of substantial equivalents for the devices described areintended to be comprehended within the spirit of the present inventionand that the invention is capable of extended application and is notconfined to the exact showing of the drawing nor to the preciseconstruction described and, therefore, such changes and modificationsmay be made therein as do not affect the spirit of the invention norexceed the scope thereof as expressed in the appended claims.

What is claimed is:

1. In a hot air heating device, comprising a casing having air inlets atone end and outlets at the opposite end, a combustion chamber mountedwithin the chamber and spaced therefrom, obliquely arranged passagesextending upwardly through the combustion chamber and communicating attheir lower ends with the space surrounding the combustion chamber andcommunicating with a central passage in the firepot, a tubing coiledaround the combustion chamber, a blower for forcing the air into thelower end of the tubing and the upper end of the tubing extendingthrough one of the obliquely arranged municating with the spacesurrounding the com- 10 bustion chamber and having their upper endscommunicating with a central passage in the combustion chamber, a tubingcoiled around the combustion chamber and having its lower end extendingthrough the casing, a blower connected to said tubing, the upper end ofthe coil extending through one of the obliquely arranged passages andterminating in the central passage.

JOHN J. JUBY, JR.

